Full encryption seems to me like putting a small band aid on a bleeding wound. Not a bad idea but I think the first thing to do is to protect against getting the wounds.
Along those lines, I have become obsessed with portable apps. Furthermore, there seems to be some apps more portable than others and I have heard these referred to as "True Portable" or simply truPortable. These are apps that require no installer (simply extract the files to a folder), they do not write to the registry or write very little, and they are stand-alone. They create their own cache files, settings files, and temp files within its own folder and deletes them upon exit if the user so chooses. There should be vastly greater demand for such programming.
I use a portable browser called SRWare Iron v11.0.700.2 which is based on Chromium but far more secure in my experience. I am essentially done with Firefox. The new 4.0 version is a behemoth that eats memory. I use TrueCrypt Portable. I use CCleaner Portable as well. I've found several useful portable apps including replacements for iTunes (WinSCP Portable), WinRAR (PeaZIP Portable), Adobe Reader (PDF-XChange Viewer Portable), and Photoshop (GIMP Portable). I understand that there are many more apps that can be rigged by the user to become portable but doing so can be illegal in some cases and also requires some level of expertise and patience. Hopefully the combined concept of open source+stealth+true portability becomes widespread and more common. I would like it to evolve into pure portability where the app needs no installer, leaves no trace of its use on a computer, and self-encrypts whatever small data files it must create but keeps those encrypted files within its own folder.
I came here looking to download the latest version of Eraser Portable but I do not see it. Surely it still exists. This is a terrific idea for a thread, it can develop into a tremendous resource for great information, and I hope more people contribute their tips and tricks here.
oh and Joel.. THANK YOU FOR ERASER!!